Adobe Exchange [CS6 panel]

Adobe Exchange Site
The new Adobe Exchange is a Creative Suite extension marketplace. It is available as a panel (palette) within a variety of CS6 applications. The Adobe Exchange panel provides a new way to search, discover, and install plug-ins, extensions, and other content for Creative Suite products. With Adobe Exchange panel, you can:

Browse through items that are available for your application
Download and install those items
Update acquired items when new versions are available

As a producer, you can create up to 10 products for Adobe Exchange, of which 2 can be paid, or you can join the Commercial Producer program in order to create any number of free, paid, and trial versions of your products.